Definition of radar in English:

radar

noun

  • 1A system for detecting the presence, direction, distance, and speed of aircraft, ships, and other objects, by sending out pulses of high-frequency electromagnetic waves that are reflected off the object back to the source.

    • ‘The boats had such a low profile and were so quick that they could be within seven miles before radar detected them.’
    • ‘Digital cellphones are similar to radar, using pulses carried by microwaves.’
    • ‘Using radar, the Protector system becomes active only after the driver has failed to react.’
    • ‘The officer must have visual estimation of speed before using radar to confirm it.’
    • ‘If someone did try to destroy us we'd detect it on radar before we were hit and could send a blast straight back.’
    • ‘That expelling of exhaust is vital in detecting their presence on radar.’
    • ‘The MCA said the study looked for impacts on compasses and various kinds of communications and positioning systems as well as radar.’
    • ‘Most of us who drive cars have grown up since the advent of radar to detect speeding.’
    • ‘The development of radar to intercept aircraft and direct gunfire revolutionized the Allied bombing offensive.’
    • ‘Part of the reason was that corporate cost cutting had left the ship without radar.’
    • ‘The robot warriors use GPS, radar, laser radar and a host of other technologies to move without human aid.’
    • ‘The flares are fired when the crew detect, by radar, they are being chased by a missile homing in on the hot exhaust of the plane.’
    • ‘After all, they argued, how can anyone seriously think photo radar will reduce speeding?’
    • ‘Chavez reported that Venezuelan radar detected the presence of the ships and planes during the coup attempt.’
    • ‘You even see a form of radar at many grocery stores when the doors open automatically!’
    • ‘Solid-state phase shifters steer optical beams for laser communications and radar.’
    • ‘Lidar is a remote sensing technique that uses laser light in much the same way that sonar uses sound or radar uses radio waves.’
    • ‘Its advanced stealth features help prevent the aircraft from being detected by radar.’
    • ‘To an extent, higher speeds can also make aircraft more visible to radar and susceptible to threats.’
    • ‘These systems use radar as the surveillance and cueing sensor to achieve this.’
    1. 1.1 An apparatus used for radar.
      • ‘Our mission was to look for hostile radars as they became active.’
      • ‘Before these radars can become operational, the air force can use a medium-range unit with a range of 1,000 km.’
      • ‘It's a network of radars and defensive missiles that will begin operating, at least some of them will, by 2004.’
      • ‘An additional limb in front is equipped with a metal detector and radar to find mines, a second sprays paint on the ground to mark the spot.’
      • ‘It hovers high above the clouds and literally no radar can detect it because of its wind-elemental cloak.’
      • ‘The system uses the ship's three dimensional circular scan radar for target tracking.’
      • ‘Adjusting his grip on the controls, he began to veer away from the colony, lest he be detected by their radar.’
      • ‘An incoming missile attack will initially be detected by the ship's long-range surveillance radar.’
      • ‘The Patriot's radar sends out electronic pulses that scan the air space above it.’
      • ‘Also in Alaska, there will be upgraded equipment and new radars for early warning.’
      • ‘‘Some of the radars needed to track the incoming missile are not yet ready,’ says Marchildon.’
      • ‘Keep an eye on those radars, and listen to whatever is being said.’
      • ‘Cyclone detection doppler radars are replacing the conventional analogue radars in important locations along the east coast.’
      • ‘The radars use high frequency and advanced radar signal processing technology to improve target resolution.’
      • ‘Our helicopters will rain fire down upon your camps before you detect them on your radar.’
      • ‘Once Saki broke through the atmosphere, the ship's radar picked up an approaching craft.’
      • ‘Invading foreign computer networks could shut down radars and electrical plants and disrupt telephone lines without firing a shot.’
      • ‘Park Air is a world leader in the field of integration, processing and display of data from radars, sensors and databases.’
      • ‘Lo said the vessel's automatic navigation system and radar were damaged during the attack.’
      • ‘Our radars indicate a multitude of small incoming fighters.’
    2. 1.2 Used to indicate that someone or something has or has not come to the attention of a person or group.
      ‘the band has been kind of off the radar these past few years’
      • ‘Going into the home stretch, the 2nd District race finally made it onto the national political radar.’
      • ‘Inner space has become a playground for uber-rich billionnaire tourists, and outer space is pretty much off the radar.’
      • ‘From a finance standpoint, Telemundo is the merest blip on GE's radar.’
      • ‘Next, and this almost slipped under the radar, Craig paid nearly a quarter million dollars in legal fees with his campaign fund.’
      • ‘Yet Bad Dreams, at least for me, flew under the radar.’
      • ‘But there's often more egregious abuse among the tiny nonprofits that operate below the radar.’
      • ‘The new Russia is out to prove something, and I think Africa features prominently on their radar.’
      • ‘The big boys are on a merger binge that is paralyzing the industry and bumping fledgling and mid-range artists off the radar.’
      • ‘You may not know what you need, but at least by asking nightly, your radar will be wide open.’
      • ‘It probably didn't cross their radar, as often happens with celebrity figures who have never presented themselves primarily as romantic characters.’
      • ‘For every person like this, there are probably a dozen or more false teachers flying under the media's radar.’
      • ‘With the exception of Moldova, this year's performances don't rate a blip on the comedic radar compared to last year.’
      • ‘For Potterton and Dempsey, the deals must seem like minute blips on a large radar.’
      • ‘It rarely raises a blip on the international radar.’
      • ‘We moved over to a network that had a lot of other problems, which were sometimes good for us because we were not on their radar.’
      • ‘Just a couple of things we want to put on your radar, certainly on our radar, this morning.’
      • ‘The bulk of the victims appear to be ordinary people who happen to have strayed across the media's radar.’
      • ‘I wonder if there are lots of other conflicts dragging on in other regions below the media radar.’
      • ‘His private life better known in Britain than here at home has not appeared on the radar of the Canadian media.’
      • ‘Winterland, a little CD released in the mid-80's and since having fallen under the radar, is one of the purest pleasures in the Hendrix catalog.’

Origin

1940s: from ra(dio) d(etection) a(nd) r(anging).

Pronunciation

radar

/ˈreɪˌdɑr//ˈrāˌdär/